No, as long as you are only going to use the Essential Project tools internally within your organization you do not need to make any modifications public. However, we would love to see the Essential toolkit grow and expand from other people’s experiences. Releasing any changes you have made allows this to happen, and allows you to benefit from seeing the changes that others are making as well. The Essential Project has been established to facilitate this sharing; however, as long as your use is internal only, the choice is yours.